From the Rolls-Royce experimental archive: a quarter of a million communications from Rolls-Royce, 1906 to 1960's. Documents from the Sir Henry Royce Memorial Foundation (SHRMF).
Piston design and the necessity of using aluminium pistons in high-speed aero engines.
| Identifier | ExFiles\Box 37\3\ scan 096 | |
| Date | 28th February 1918 | |
| R.{Sir Henry Royce} H.{Arthur M. Hanbury - Head Complaints} 215a (500 T) (S.D. 408. 26.4.17.) Bm. 2/156/13. -2- R2/W28.2.18. The Controller, Technical Dept. the design of the piston may be better than that of some other makers, we certainly tax the piston perhaps more than in many other engines, owing to high speeds and high explosive pressures. We think we can only watch the actual pistons in practical service and fix a life according to experience. We think, however, that aluminium pistons are such an absolute necessity to a high speed aero engine, that even if the whole of those in service were changed after even 250 hours of running, we ought to continue to use them. Yours faithfully, | ||